1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at http://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 23 #include "timeval.h" 24 25 #if defined(WIN32) && !defined(MSDOS) 26 curlx_tvnow(void)27 struct timeval curlx_tvnow(void) 28 { 29 /* 30 ** GetTickCount() is available on _all_ Windows versions from W95 up 31 ** to nowadays. Returns milliseconds elapsed since last system boot, 32 ** increases monotonically and wraps once 49.7 days have elapsed. 33 */ 34 struct timeval now; 35 #if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \ 36 (_WIN32_WINNT < _WIN32_WINNT_VISTA) 37 DWORD milliseconds = GetTickCount(); 38 now.tv_sec = milliseconds / 1000; 39 now.tv_usec = (milliseconds % 1000) * 1000; 40 #else 41 ULONGLONG milliseconds = GetTickCount64(); 42 now.tv_sec = (long) (milliseconds / 1000); 43 now.tv_usec = (long) (milliseconds % 1000) * 1000; 44 #endif 45 46 return now; 47 } 48 49 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) 50 curlx_tvnow(void)51 struct timeval curlx_tvnow(void) 52 { 53 /* 54 ** clock_gettime() is granted to be increased monotonically when the 55 ** monotonic clock is queried. Time starting point is unspecified, it 56 ** could be the system start-up time, the Epoch, or something else, 57 ** in any case the time starting point does not change once that the 58 ** system has started up. 59 */ 60 struct timeval now; 61 struct timespec tsnow; 62 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) { 63 now.tv_sec = tsnow.tv_sec; 64 now.tv_usec = tsnow.tv_nsec / 1000; 65 } 66 /* 67 ** Even when the configure process has truly detected monotonic clock 68 ** availability, it might happen that it is not actually available at 69 ** run-time. When this occurs simply fallback to other time source. 70 */ 71 #ifdef HAVE_GETTIMEOFDAY 72 else 73 (void)gettimeofday(&now, NULL); 74 #else 75 else { 76 now.tv_sec = (long)time(NULL); 77 now.tv_usec = 0; 78 } 79 #endif 80 return now; 81 } 82 83 #elif defined(HAVE_GETTIMEOFDAY) 84 curlx_tvnow(void)85 struct timeval curlx_tvnow(void) 86 { 87 /* 88 ** gettimeofday() is not granted to be increased monotonically, due to 89 ** clock drifting and external source time synchronization it can jump 90 ** forward or backward in time. 91 */ 92 struct timeval now; 93 (void)gettimeofday(&now, NULL); 94 return now; 95 } 96 97 #else 98 curlx_tvnow(void)99 struct timeval curlx_tvnow(void) 100 { 101 /* 102 ** time() returns the value of time in seconds since the Epoch. 103 */ 104 struct timeval now; 105 now.tv_sec = (long)time(NULL); 106 now.tv_usec = 0; 107 return now; 108 } 109 110 #endif 111 112 /* 113 * Make sure that the first argument is the more recent time, as otherwise 114 * we'll get a weird negative time-diff back... 115 * 116 * Returns: the time difference in number of milliseconds. 117 */ curlx_tvdiff(struct timeval newer,struct timeval older)118 long curlx_tvdiff(struct timeval newer, struct timeval older) 119 { 120 return (newer.tv_sec-older.tv_sec)*1000+ 121 (long)(newer.tv_usec-older.tv_usec)/1000; 122 } 123 124 /* 125 * Same as curlx_tvdiff but with full usec resolution. 126 * 127 * Returns: the time difference in seconds with subsecond resolution. 128 */ curlx_tvdiff_secs(struct timeval newer,struct timeval older)129 double curlx_tvdiff_secs(struct timeval newer, struct timeval older) 130 { 131 if(newer.tv_sec != older.tv_sec) 132 return (double)(newer.tv_sec-older.tv_sec)+ 133 (double)(newer.tv_usec-older.tv_usec)/1000000.0; 134 else 135 return (double)(newer.tv_usec-older.tv_usec)/1000000.0; 136 } 137 138 /* return the number of seconds in the given input timeval struct */ Curl_tvlong(struct timeval t1)139 long Curl_tvlong(struct timeval t1) 140 { 141 return t1.tv_sec; 142 } 143